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9.1 Introduction

Resolvers are considerably easier to configure than name servers. A BIND resolver supports just a few configuration directives:

domain

Sets the resolver's local domain name

search

Sets the resolver's search list and, implicitly, the local domain name

nameserver

Configures the resolver to query a remote name server

sortlist

Configures the resolver to sort certain A records to the beginning of responses

options

Controls miscellaneous aspects of the resolver's configuration, such as timeouts

Windows resolvers support configuration of a similar set of parameters: at least the local domain name, search list, and remote name servers to query. This chapter includes recipes for configuring each of these aspects of a resolver's behavior, for both BIND and Windows resolvers. It also includes several sample programs that demonstrate how to use the invaluable Net::DNS module to send queries, request zone transfers, and send dynamic updates from a Perl program.

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